Redescription of Hypoptopoma inexspectata (Holmberg, 1883), with notes on its anatomy (Siluriformes: Loricariidae).

Aquino, Adriana E. and Miquelarena, Amalia M. (2001) Redescription of Hypoptopoma inexspectata (Holmberg, 1883), with notes on its anatomy (Siluriformes: Loricariidae). Physis (Buenos Aires), Secc B, 58, pp. 134-135.

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Abstract

Hypoptopoma inexspectata is diagnosed and redescribed based on the examination of additional material and comparison with its congeners. This poorly known hypoptopomine species is distributed in the Paraguay and Paraná river draínages. Hypoptopoma inexspectata is diagnosable based on the autapomorphy biserial arrangement of anterior snout rostral margin odontodes, laterally extended to limit between second and third infraorbital plates, with dorsally directed dorsad series separated from ventrally directed ventrad series by a narrow odontode-free area, which at the level of first and second infraorbital plates is reduced to a dividing line of the series. The species can be further distinguished by the combination (1) low number of canal-bearing lateral plates (20-22, typically 21), (2) presence of a shield of prepectoral dermal plates, (3) arrangement of abdominal plates in one paired series of 3-5 plates, (4) shorter least interorbital distance 4856% head lengh, (5) larger horizontal eye diameter 17-20% head lengh, and (6) least orbit-nare distance 812% head lengh. Intraspecific variation skull dermal bones, neuracranium and suspensorium bones, dermal plates, adipose fin is reported. (PDF has 20 pages.)

Item Type: Article
Title: Redescription of Hypoptopoma inexspectata (Holmberg, 1883), with notes on its anatomy (Siluriformes: Loricariidae).
Personal Creator/Author:
CreatorsEmail
Aquino, Adriana E.aaquino@amnh.org
Miquelarena, Amalia M.miquelar@fcnym.unlp.edu.ar
Journal or Publication Title: Physis (Buenos Aires), Secc B
Series Name: ProBiota, Serie Documentos Relacionados
Volume: 58
Page Range: pp. 134-135
Date: 2001
Publisher: Physis
Place of Publication: Buenos Aires
Projects: ProBiota: Programa para el Estudio y Uso Sustentable de la Biota Austral
Funders: Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP)
Additional Information: Debe citarse: AQUINO, A. E. & A. M. MIQUELARENA. 2000(2001). Redescription of Hypoptopoma inexspectata (Holmberg, 1883), with notes on its anatomy (Siluriformes: Loricariidae) Physis, Buenos Aires, Sección B, 58: 134-135. ISSN 0325-0350. Deposited by: Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
Uncontrolled Keywords: Argentina, Ichthyology, Ictiología, Siluriformes, Loricariidae, Hypoptopomatinae, Taxonomy, Taxonomía, Anatomy, Anatomía
Subjects: Biology
Limnology
Item ID: 1815
Depositing User: Dr. Hugo Luis López
Date Deposited: 31 Jan 2009 18:34
Last Modified: 29 Sep 2011 20:01
URI: http://aquaticcommons.org/id/eprint/1815

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